textproduct: Quad Cities

KEY MESSAGES

- Pleasant, mainly dry weather is forecast through the period with near to above normal temperatures.

SHORT TERM /THROUGH TONIGHT/

Issued at 206 AM CDT Sun Oct 4 2026

A cold front is forecast to exit into northwest Illinois by 12 UTC Sunday and then move to east of a Freeport to Princeton Illinois line by 14 UTC Sunday. CAMs and the NBM show a slight increase in winds behind the front of 5 to 10 MPH and gusts up to 20 MPH through 18 UTC mainly to the north of Highway 30. Based on the previous days model performance made the decision to adjust the dewpoints down to the NBM 5th percentile and added a couple of degrees to the forecast high temperatures which range from the upper 60s along the highway 20 corridor to the mid 70s south of a Fairfield to Galesburg line.

Surface high pressure is forecast to build eastward into the area Sunday night. Clear skies are expected with light winds. Low temperatures on Monday morning are forecast to be in the 40s.

LONG TERM /MONDAY THROUGH SATURDAY/

Issued at 206 AM CDT Sun Oct 4 2026

Little change is forecast in the overall synoptic pattern through Friday night. This results in persistent ridging across the western US and troughing over the northeast US and Canadian Maritimes. This places eastern Iowa, northwest Illinois, and far northeast Missouri in northwest flow aloft through the period. This results in a dry forecast over the next 7 days. Tuesday and Wednesday look to be the warmest of the next 7 days as winds turn to the south and become gusty.

Thursday into Friday, the flow aloft begins to flatten to zonal flow as a a deep trough digs into the western US. This allows for several disturbances to move across the area. Confidence is low in the timing and placement of precipitation during the period with limited moisture. Model forecast precipitation is less than a tenth of an inch.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/

Issued at 1227 AM CDT Sun Oct 4 2026

A weak storm system is passing to the north through 12 UTC Sunday with a trailing cold front. As the cold front passes the TAF sites through 12 UTC winds will switch from the southwest to northwest. Wind speeds are forecast to increase to 5 to 10 knots after 12 UTC with gusts after 15 UTC of 15 to 20 knots. Winds are then forecast to diminish after 00 UTC on Monday. Ceilings with the front are forecast to be around 7 to 10 kft. Overall VFR conditions are expected through the period.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.